/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.transport.ptcp.psocket.threads;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import cgl.narada.transport.ptcp.psocket.PTCPOutputStream;
import cgl.narada.transport.ptcp.psocket.tools.PTCPPacket;
import cgl.narada.transport.ptcp.psocket.tools.PTCPParameters;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
public class PTCPSenderWorker implements Runnable, PTCPParameters {

  private DataOutputStream dos_ = null;
  private PTCPOutputStream parent_ = null;
  private PTCPPacket packet_ = null;
  private String name_ = null;
  private String module_name_ = "PTCPSenderWorker: ";

  public PTCPSenderWorker() {
  }

  public PTCPSenderWorker(PTCPOutputStream parent, OutputStream os, PTCPPacket packet) {
    initialize(parent, os, packet, "-1");

  }

  public PTCPSenderWorker(PTCPOutputStream parent, OutputStream os, PTCPPacket packet,
                       String name) {
    initialize(parent, os, packet, name);
  }

  public PTCPSenderWorker(PTCPOutputStream parent, OutputStream os, String name) {
    initialize(parent, os, null, name);
  }

  public PTCPSenderWorker(PTCPOutputStream parent, OutputStream os) {
    initialize(parent, os, null, "-1");

  }

  private void initialize(PTCPOutputStream parent, OutputStream os, PTCPPacket packet,
                          String name) {
    this.parent_ = parent;
    this.packet_ = packet;
    this.name_ = name;
    try {
      dos_ = new DataOutputStream(os);
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }

  }

  public static void main(String[] args) {
    PTCPSenderWorker psw = new PTCPSenderWorker();
  }

  public void run() {
    while (!parent_.finished()) {
      send();
      parent_.wakeUp(name_);
    }
  }

  public synchronized void send() {
    boolean sendIt = true;
    while (packet_ == null) {
      try {
        wait();
      }
      catch (InterruptedException e) {
        e.printStackTrace();
        sendIt = false;
      }
    }

    if (!parent_.finished() && sendIt) {
      try {
        dos_.writeInt(packet_.getPacketNumber());
        dos_.writeInt(packet_.getPacketSize());
        dos_.write(packet_.getData(), 0, packet_.getPacketSize());
        dos_.writeLong(System.currentTimeMillis());
        if (PTCPSenderWorker_Debug) {
          System.out.println(module_name_ + name_ + " has sent " +
                             packet_.getPacketNumber() +
                             ". packet " + packet_.getPacketSize());

        }
      }
      catch (IOException ex) {
        ex.printStackTrace();
      }
    }

    packet_ = null;
  }

  public synchronized void wakeup(PTCPPacket packet) {
    packet_ = packet;
    if (packet != null) {
      notify(); // wake up a writer that is waiting to write
    }
    else {
      System.out.println(module_name_ + "ERROR: packet is null");
    }
  }
}
